Machine



(No Model.) 2 Sheet's--Sheet 1.

P; CHASE.

LASTING MACHINE. No. 363,283. Patented May 17, 1887.

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NY PETERS. Ffivizlniilhcgmphnr. Washington. 0. c.

(No Model.) 2 SheetsSheet 2.

F. CHASE.

LASTING MACHINE.

Patented May 17., 1887. r &

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FRANK CHASE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE CHASE LASTING MACHINE COMPANY, OF SAME PLACE.

LASTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 363,283, dated May 17, 1887.

Application filed March 25, 15587. Serial No. 232,407. (No model.) 7

To aZZ whom it may concern:

Be it known that I, FRANK CHASE, of Bos ton, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Lasting Machines for Boots 01' Shoes, of which the following is a specification.

My present invention is an improvement on that set forth in my Letters Patent, No. 319,7 84, of J one 8, 1885, having relation more particularly to devices for actuating the, lastingwlpers, or side wipers, as they are somet mes called. I still actuate the two sets of slde wipers in such manner that, while operated simultaneously from asingle power mechanisnnthey may still act independently of one another upon the two sides of the last, and this result I obtain, as before, by the employment, among other things, of what may be considered a yielding connection between the power mechanism and the actuating devices. I aim, however, in my present improvement to obtain this yielding connection without the employment of springs or the like, and in such manner that there may be a positive engagement between the motor-shaft and the devices actuated thereby. It is also my aim to dispense with the use of the cord and pulleys as equalizing devices in advancing the wipers, and to substitute therefor what I believe to be a more efficient and durable instrumentality for the purpose.

The nature of my improvements and the manner in which the same are or may be carried into effect can best be explained and understood by reference to the accompanying drawings, in which- Figure 1 is a general plan of so much of a lasting machine as needed for the purposeof illustrating my improvements. Fig. 2 is an end elevation of the same. Fig. 3.is a side elevation of a portion of the upper part of the frame or supportingtable and one set of wipers thereon.

Of the simultaneously actuated, but independently operating, side wipers I have indicated but four in each set. This is the number I generally use, and, at any rate, is sufficient for the purpose of explaining my inven- 50 tion.

0 represents the longitudinal slides, which, by means of half-nuts engaging screw-threads of varying pitches, are moved longitudinally 'of the last, all as described in my said Letters Patent No. 319,784. 1? are the blocks, pivoted to said slides O, and R are the wiper slides,mounted in ways in said blocks. These parts are arranged and combined together in the same way as are the like-lettered parts in my aforesaid patent. I have omitted to repre 6 sent the wipers which are attached to the inner ends of the wiper-slides. They may be of any suitable construction. I prefer to use nipperwipers such as shown and described in my Letters Patent, No. 337 ,924, of March 16, 1886.

The frame of the machine is lettered A. The central opening in its top is bordered on the sides by the two sets of wipers, and-between them, as usual, is to be supported the last. s

In lieu of the cords and pulleys formerly employed by me to advance the wiper-slides R, I now make use of a system of connectingrods and equalizing-levers. There are two pairs of wiper-slides in each set. Each slide has pinned or pivoted to it a connecting-rod, a, and the two connecting-rods of each pair of slides are pivoted to opposite ends of a lever, b. The two levers b in turn are pivoted at points midway between their two ends to opposite ends of a third lever, c, which is pivoted at its center to some suitable support capable of moving inwardly or toward the last. The support in this instance is the upper end of a vertical lever, d, pivoted at e to the frame of the machine. It will be understood that this lever d is typical of any of the numerous devices well known to those skilled in the art which may be used to advance and retract the lever c. If the lower end of the lever d be 0 pulled outwardly, its upper end, and consequently the lever 0, move inwardly or toward the last. The, effect of this movement is to advance all of the wiper-slidcs simultaneously. Atthe same time it will be noted that of the 5 two wiper-slides of each pair, if one brings up against the last sooner than the other, the latter, by reason of its connection with the lever b, can still advance. It will also be noted that of the two pairs of slides the one pair, as a whole, can advance farther than the other, owing to the connection of their levers b to the common pivoted lever 0. Thus by this system of connecting-rods and equalizing- 5 levers the slides which constitute a set are advanced simultaneously, and yet may act independently, each advancing any distance required by the necessity of the work or the shape of that portion of the last opposite which it may be located.

It remains to describe the means I employ for actuating the two opposite sets of wiperslides by a single power mechanism without preventing that movement of each set inde- 1 pendent of the other set which may be required by the shape of the sides of the last upon which they operate, respectively. I remark here that it is not indispensable that the means just referred toshould be employedin conjunction with the equalizing system. hereinbefore described. The two are not interdependent; but I prefer to use them in combination.

Each vertical lever d is operated by a cam, f, fast on the motor-shaft g, a pin or roller-stud on the tail of the lever entering the groove in the cam. These grooves are of such shape that when the shaft is revolved the cams will cause the two levers to simultaneously advance or retract the two sets of wiper-slides, according tothe direction in which the shaft is rotated.

The shaft may derive its movement from any suitable source=f=in this instance from adrivingshaft, h, through the intermediary of gear- 3 5 ing 6 j: Thus far there is between the two sets of wipers and the power mechanism, or the shaft'g, no yielding connection, or, mother words, no connection which will permit the rotation of the shaft to continue after either one 0 of the sets of wiper-slides comes to rest or can advance no farther. To make provision for this I so arrange and mount the shaft 9 in its bearings that it may have some end-playthat is to say, be capable of motion in the direction of its length. No great range of such motion is required. In practice I find that from one to two inches is sufficient. One of the gears t j (in this instance j) is made enough broader than the other to permit of this movement without throwing the two gears out of engagement. The result of this arrangement is as follows: Suppose, for instance, that the shaft is rotating in a direction to advance both sets of wipers, and that one set-for example,

the right-hand set in Fig. 2brings up against 5 5 the last before the other set. The lever d of the right-hand set then becomes immovable, and as the shaft continues to revolve said lever, by its action upon the cam which it engages, will force the shaft to move to the left, with the effect of enhancing the advancing movement of the lever and wipers on that side. Thus, while each lever positively engages the power mechanism common to both of them, that mechanism can still move to actuate one lever, although the other may have come to rest.

Having now described my improvements and the best way at present known to me of carrying the same into effect, I desire it to be understood that I do not restrict myself to the details herein shown and described in illustration of said improvements,hecause, manifestly, the same can be considerably varied without departure from the spirit of my invention; but

What I claim herein as new and of my own invention is as follows:

1. The combination, with the wiper-slides, of equalizing-levers and connecting-rods pivoted at one end to said slides and at the other end to said levers, under the arrangementand for operation substantially as hereinbefore set' forth.

2. The combination, with the wiper-slides, of theconnecting-rods a, levers b c, and the lever d, substantially as and for the purposes here inbefore set forth.

'3. The combination of two opposed sets of wiper-slides, mechanism for advancing each set, and an actuating-shaft for said mechanism capable of endwise movement in its bearings, all substantially as and for the purposes hereinbefore set forth.

4. The combination of the two opposed sets of wiper-slides, the two systems of connectingrods and equalizing-levers, one for each, set, a motor shaft common to both systems, capable of endwise movement in its bearings, and means, substantially as described, whereby each system is connected to and actuated by said shaft, the combination being and acting substantially as hereinbefore set forth.

- 1 In testimony whereof I have hereunto set my hand this 18th day of March, A. D. 1887.

FRANK CHASE.

Witnesses:

EWELL A. DICK, MARVIN A. OUsrIs. 

